[i18n] Correcting direction of datatree in horde (for rtl)

[Chuck Hagenbuch]

Quoting persian-horde at metanetworking.com:

> We use from 'style=float: none' because it works in every direction. but
> for avoiding from some browser effects we have another patch in attachment
> that uses from class="leftFloat" instead of 'style=float: none'.

Committed, thanks.

-chuck

-- 
"But she goes not abroad in search of monsters to destroy." - John 
Quincy Adams